Stand on one leg. Red-crowned cranes often stand on one leg when resting, with their heads turned and inserted between their back feathers. Whether foraging or resting, there are often 1 adult birds who are particularly alert and constantly look around. When they find danger, they send out' ko-lo-lo-'and fly in the air when the danger approaches.

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A reason to rest on one foot

Cranes usually stand on one leg only when they are resting or sleeping. According to ornithologists, they do this to reduce energy consumption and rest with one foot under their wings. Usually, they use their feet alternately to "stand independently".

This behavior of cranes is very similar to that of people standing for a long time, adjusting their center of gravity and letting their legs take turns to bear pressure. The crane can't change its center of gravity, only from one foot to the other. It is also a good way to save energy consumption and help regulate body temperature.

Simply put, the foot that the crane put away will dissipate less heat because it is covered with warm feathers. In addition to cranes, there are many birds with long legs, such as yellow-footed green doves and herons, which stand on one leg when resting. But when these birds feel dangerous or prepare for a long journey, they all land with their feet, then spread their wings and fly high into the air.

Extended source: Baidu Encyclopedia-Red-crowned Crane